/*
* Copyright (c) 2016 Martin Davis.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
*
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.locationtech.jts.math;
import junit.framework.TestCase;
import junit.textui.TestRunner;
public class Vector2DTest extends TestCase {
private static final double TOLERANCE = 1E-5;
public static void main(String args[]) {
TestRunner.run(Vector2DTest.class);
}
public Vector2DTest(String name) { super(name); }
public void testLength()
{
assertEquals(Vector2D.create(0,1).length(), 1.0, TOLERANCE);
assertEquals(Vector2D.create(0,-1).length(), 1.0, TOLERANCE);
assertEquals(Vector2D.create(1,1).length(), Math.sqrt(2.0), TOLERANCE);
assertEquals(Vector2D.create(3,4).length(), 5, TOLERANCE);
}
public void testIsParallel() throws Exception
{
assertTrue(Vector2D.create(0,1).isParallel(Vector2D.create(0,2)));
assertTrue(Vector2D.create(1,1).isParallel(Vector2D.create(2,2)));
assertTrue(Vector2D.create(-1,-1).isParallel(Vector2D.create(2,2)));
assertTrue(! Vector2D.create(1,-1).isParallel(Vector2D.create(2,2)));
}
public void testToCoordinate()
{
assertEquals(Vector2D.create(
Vector2D.create(1,2).toCoordinate()),
Vector2D.create(1,2), TOLERANCE);
}
void assertEquals(Vector2D v1, Vector2D v2)
{
assertTrue(v1.equals(v2));
}
void assertEquals(Vector2D v1, Vector2D v2, double tolerance)
{
assertEquals(v1.getX(), v2.getX(), tolerance);
assertEquals(v1.getY(), v2.getY(), tolerance);
}
}